l pfau



J. L. PFAU, Jr.

Heating Stove.

Patented April 19, 1870.

F/G, /i

N FETERS. PHnTmLlTMOGRAPHER, WASHINGTON. D c.

W/ T/VESSES.'

aient (twine.

JOHN L. PFAU, JR., OF QUINOY, ILLINOIS.

Letters Patent No.'102,036, dated April 19, 1870.

ATTACHMENT FOR. HEATING-STOVES.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern:

Be it known that I, J OHN L. PEAU, Jr., of Quincy, in the county of Adams and State of Illinois, have iuvented a new and useful Improvement in Stoves; and I do hi'eby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the saine, reference being had to the accompanying drawing forming part of this specification.

This invention relates to improvements in stoves and furnaces for burning coal, and more particularly cylindrical stoves; and consists in an air and gas-mixing apparatus arranged for resting on the top of the fire-brick, above the tire, and receiving the air through the side ofthe stove, heat-ing it and finally delivering it to the gas arising from the re below in a distributed way, calculated to` facilitate the burning of the same and the smoke more e'ectually than when the cold air is admitted directly to the gas, as in the common arrangements.

Figure 1 is a sectional elevation of my improved mixer and a part of a cylinder stove, the latter being shown in dotted lilies.

Figure 2 is a plan view ofthe said mixer.

Similar letters ofreference. indicate corresponding parts.

I make a hollow circular case, A, withla section about a's wide as the opening for the ,door of the stove removed, of' cast metal, fire-clay, or other suitable subst-ance, of the size of the interior of the stove above the rire-brick liningr B, adapted to rest on the top of said lining, and provided with a hollow hood, O, at the upper side, the under wall of which is perforated and arched over about half of the vertical hollow space through the. case A.

I divide the latter with lower and upper chambers, D E,hy a horizontal dividing-plate, F, made shorter than the case, and admitting the air topass up from D to E at the ends G.

rIhe lower chamber D receives the coldair through" the opening H, and conducts it around to the front of lche case to chamber E; thence it is conducted back and up through openings I to the hollow hoodO, from which it is delivered, through the overhangiug perfo'- tcd wall K,to the gas arising from the fire,in a highlyheated state, calculated to produce thc most perfect', combustion of the gas and smoke.

These mixers may be made separately from the stoves, to be put in and taken out when required, and will be found much more eective than the doublewalled stoves now used for admitting the air to the gas through small peribrations at the top of the lining, which are very liable to become obstruct-ed, and cannot be readily reopened, especially when the space below becomes filled.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- An air-heating and mixing device for stoves and furnaces, consisting of the case A, with dividing-plate F, and the hollow perforated hood O, arranged for application and operation, substantially as specified.

JOHN L. PFAU, Jn.

Witnesses WARREN F. Prrivnr, JNO. M. EULL. 

